Add Matt Farmer to 2020-01-09 agenda (#341)

Co-authored-by: Lee Byron <[email protected]>

Author: Matt Farmer

agendas/2020-01-09.md

@@ -35,6 +35,7 @@ agenda, edit this file.*
 | Jiyue Wang               | Facebook                 | New York, NY
 | Alan Cha                 | IBM Research             | Yorktown Heights, NY, US
 | Krithika (Kriti) Prakash | IBM                      | New Jersey, US
+| Matt Farmer              | Individual Contrib       | Oakland, CA, US
 | Erik Wittern             | IBM                      | Hamburg, Germany
 | Mike Marcacci            | Marcacci Labs            | Woodside, CA, US
 | Usama liaquat✏️           | Gomarry / xPackage Team  | Karachi, Pakistan
@@ -72,5 +73,11 @@ Example agenda item:
    - [Currently open action items](https://github.com/graphql/graphql-wg/issues?q=is%3Aissue+is%3Aopen+label%3A%22Action+item+%3Aclapper%3A%22)
 1. Discuss possible standardization of stream and defer. [Issue](https://github.com/graphql/graphql-wg/issues/329) (30m Keweiqu)
 1. [Input Union RFC](https://github.com/graphql/graphql-spec/blob/master/rfcs/InputUnion.md) (15m, Vince)
+1. Custom Scalar Specification URIs (10m, Matt Farmer and Evan and Andi)
+   - [`graphql-js` Pull Request](https://github.com/graphql/graphql-js/pull/2276) is ready for review
+      - The spec has changed from `@specified(by: String)` to `@specifiedBy(url: String)`, and needs minor update
+   - https://github.com/graphql/graphql-spec/issues/635
+   - https://github.com/graphql/graphql-spec/pull/649
+   - Discuss next steps
 1. [Defer and Stream Directives Sketch RFC](https://github.com/graphql/graphql-spec/pull/667) (15m, Liliana)
 1. *ADD YOUR AGENDA ABOVE*